What was found
* FWD ACFT MOUNT, FWD OF FS280, LH INTERCOSTAL IS CORRODED. (C-CHECK) RO 3/25/2021 PRIOR TO BLENDING INTERCOSTAL FOUND THAT PART HAS HEAVY CORROSION AND IS MORE THAN 30% OF THE OVERALL LENGTH OF A MEMBER AND PART HAS DAMAGE IN MORE THAN ONE ELEMENT AT A GIVEN CROSS SECTION INCLUDING THE ATTACHED SKIN ELEMENT. OUT OF LIMITS PER CRJ 700 SRMN 53-00-00-101-001-A01. REMOVED AND INSTALLED NEW LH INTERCOSTAL BETWEEN FS265 AND FS280 AT STGR 26L REF CRJ700 SRM 51-42-06-001-001-A01, 51-42-21-001-001-A01 AND DWG CC670-32179 REV A. / NO LEAKS NOTED COMPLIED WITH 51-900-1002-SKY